Compare the Seat Leon ST Cupra 300 DSG - [2017] vs Mercedes SL Class 60 AMG 6.0 V8 - [1993]. Find out which car is the fastest, most powerful, lightest or has the biggest engine in our top trumps style comparison page. Find out which car has the highest top speed or is the fastest accelerating, is it the Seat Leon ST Cupra 300 DSG or the Mercedes SL Class 60 AMG 6.0 V8. We'll leave it up to you to decide which is your favourite.